Chuck key



FIG. 1 is a perspective view of a chuck key showing my new design;

FIG. 2 is a top plan view thereof on an enlarged scale;

FIG. 3 is a bottom plan view thereof on an enlarged scale;

FIG. 4 is a right side elevational view thereof on an enlarged scale;

FIG. 5 is an end elevational view thereof on an enlarged scale;

FIG. 6 is an opposite end elevational view thereof on an enlarged scale;

FIG. 7 is a left side elevational view thereof on an enlarged scale. 

The ornamental design for a chuck key, as shown and described. 